Literature DB >> 20122862

New high dielectric constant materials for tailoring the B1+ distribution at high magnetic fields.

K Haines1, N B Smith, A G Webb.   

Abstract

The spatial distribution of electromagnetic fields within the human body can be tailored using external dielectric materials. Here, we introduce a new material with high dielectric constant, and also low background MRI signal. The material is based upon metal titanates, which can be made into a geometrically-formable suspension in de-ionized water. The material properties of the suspension are characterized from 100 to 400 MHz. Results obtained at 7 T show a significant increase in image intensity in areas such as the temporal lobe and base of the brain with the new material placed around the head, and improved performance compared to purely water-based gels. 2010 Elsevier Inc. All rights reserved.

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Year:  2010        PMID: 20122862     DOI: 10.1016/j.jmr.2010.01.003

Source DB:  PubMed          Journal:  J Magn Reson        ISSN: 1090-7807            Impact factor:   2.229


  36 in total

1.  Image homogenization using pre-emphasis method for high field MRI.

Authors:  Ye Li; Chunsheng Wang; Baiying Yu; Daniel Vigneron; Wei Chen; Xiaoliang Zhang
Journal:  Quant Imaging Med Surg       Date:  2013-08

2.  Longitudinal Persistence of Meningeal Enhancement on Postcontrast 7T 3D-FLAIR MRI in Multiple Sclerosis.

Authors:  S N Jonas; I Izbudak; A A Frazier; D M Harrison
Journal:  AJNR Am J Neuroradiol       Date:  2018-09-13       Impact factor: 3.825

3.  A novel method to decrease electric field and SAR using an external high dielectric sleeve at 3 T head MRI: numerical and experimental results.

Authors:  Bu S Park; Sunder S Rajan; Joshua W Guag; Leonardo M Angelone
Journal:  IEEE Trans Biomed Eng       Date:  2014-10-22       Impact factor: 4.538

Review 4.  Tradeoffs in pushing the spatial resolution of fMRI for the 7T Human Connectome Project.

Authors:  An T Vu; Keith Jamison; Matthew F Glasser; Stephen M Smith; Timothy Coalson; Steen Moeller; Edward J Auerbach; Kamil Uğurbil; Essa Yacoub
Journal:  Neuroimage       Date:  2016-11-25       Impact factor: 6.556

5.  Improvements of transmit efficiency and receive sensitivity with ultrahigh dielectric constant (uHDC) ceramics at 1.5 T and 3 T.

Authors:  Sebastian Rupprecht; Christopher T Sica; Wei Chen; Michael T Lanagan; Qing X Yang
Journal:  Magn Reson Med       Date:  2017-09-25       Impact factor: 4.668

6.  Whole-brain three-dimensional T2-weighted BOLD functional magnetic resonance imaging at 7 Tesla.

Authors:  Jun Hua; Qin Qin; Peter C M van Zijl; James J Pekar; Craig K Jones
Journal:  Magn Reson Med       Date:  2013-12-12       Impact factor: 4.668

7.  Disentangling the effects of high permittivity materials on signal optimization and sample noise reduction via ideal current patterns.

Authors:  Manushka V Vaidya; Daniel K Sodickson; Christopher M Collins; Riccardo Lattanzi
Journal:  Magn Reson Med       Date:  2018-11-13       Impact factor: 4.668

8.  7T MPFLAIR versus MP2RAGE for Quantifying Lesion Volume in Multiple Sclerosis.

Authors:  Margaret Spini; Seongjin Choi; Daniel M Harrison
Journal:  J Neuroimaging       Date:  2020-06-22       Impact factor: 2.486

9.  Radiofrequency field enhancement with high dielectric constant (HDC) pads in a receive array coil at 3.0T.

Authors:  Qing X Yang; Sebastian Rupprecht; Wei Luo; Christopher Sica; Zachary Herse; Jianli Wang; Zhipeng Cao; Jeffrey Vesek; Michael T Lanagan; Giuseppe Carluccio; Yeun-Chul Ryu; Christopher M Collins
Journal:  J Magn Reson Imaging       Date:  2013-01-04       Impact factor: 4.813

10.  Manipulating transmit and receive sensitivities of radiofrequency surface coils using shielded and unshielded high-permittivity materials.

Authors:  Manushka V Vaidya; Cem M Deniz; Christopher M Collins; Daniel K Sodickson; Riccardo Lattanzi
Journal:  MAGMA       Date:  2017-11-06       Impact factor: 2.310

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